Project Description:
The existing overhead power line between the Hinterthal and Wernisberg power plants needs to be renewed due to its age. A new route must be determined to ensure a future-proof electricity supply. As part of the planning process, both overhead line and cable options were analyzed to identify the best solution in terms of technical, ecological, and economic factors. The project includes the use of modern steel monopole towers for the new overhead line, providing high stability and durability. Additionally, a planning approval dossier is required for this project, which will be reviewed by the relevant authorities.
Technical Key Data:
- Line length: approx. 11 km (overhead and cable line)
- Topography: 40% forest / 60% open field (100 affected parcels)
- New towers: Over 40 steel monopole towers with two systems, offering high load capacity and resistance
- Tower heights: 25 – 53 m to ensure optimal routing and minimize environmental and landscape impact
- Span width: 200 – 450 m, depending on topography and geotechnical conditions
- Project budget: approx. 10 million CHF, based on a detailed cost estimate considering state-of-the-art construction methods
Work Packages & Process:
- Feasibility & route study: Evaluation of different routing options to determine the optimal solution from a technical, ecological, and economic perspective. Both overhead line and cable variants were examined to ensure the best possible implementation.
- Grid concept: Development of a sustainable grid concept, considering future electricity supply requirements.
- Preliminary cost estimate: Initial cost estimation based on the selected options for budget planning.
- Project application & conceptual planning: Submission of planning documents for official review and approval.
Construction Project & Approval Process:
- Concept optimization: Detailed planning of the final routing, taking into account all technical and environmental conditions.
- Preparation of ESTI planning documents: Compilation of the necessary documentation for the Swiss Federal Inspectorate for Heavy Current Installations (ESTI) to secure project approval.
- Start of easement negotiations: Discussions with landowners to secure the necessary areas for the power line corridor.
- Detailed cost estimation: Refined cost calculation based on the final design.
FGS supports this project with state-of-the-art technology and extensive engineering expertise. Our know-how ensures that grid planning meets the highest quality and efficiency standards. By utilizing innovative methods and sustainable solutions, we contribute to the development of a secure and high-performance electricity infrastructure.
